2521421617 has 16 divisors (see below), whose sum is σ = 3064380480. Its totient is φ = 2042913600.

The previous prime is 2521421599. The next prime is 2521421633. The reversal of 2521421617 is 7161241252.

2521421617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2521421617 - 2¹⁹ = 2520897329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2521421677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299859 + ... + 308152.

It is an arithmetic number, because the mean of its divisors is an integer number (191523780).

Almost surely, 2^2521421617 is an apocalyptic number.

It is an amenable number.

2521421617 is a deficient number, since it is larger than the sum of its proper divisors (542958863).

2521421617 is a wasteful number, since it uses less digits than its factorization.

2521421617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608064.

The product of its digits is 6720, while the sum is 31.

The square root of 2521421617 is about 50213.7592398737. The cubic root of 2521421617 is about 1361.0742696106.

Adding to 2521421617 its reverse (7161241252), we get a palindrome (9682662869).

The spelling of 2521421617 in words is "two billion, five hundred twenty-one million, four hundred twenty-one thousand, six hundred seventeen".